Iris - Non-replicated properties of FInstancedStruct reset after replication

This issue only occurs with Iris enabled.

• Create a struct with at least one property marked as not replicated.
• On the server, create a replicated FInstancedStruct of this struct.
• When this instanced struct is received on the client, change the non-replicated property locally.
• Change a replicated property of the instanced struct on the server.

Expected: The client will receive the new value for the replicated property, with nothing else in the struct changing.
Actual: The client will receive the new value for the replicated property, and the value of the non-replicated property in the struct will be reset to its default value.